Joplin high school http://kbia.org en In Joplin, President Obama urges students to "pay it forward" http://kbia.org/post/joplin-president-obama-urges-students-pay-it-forward <em>KSMU&#39;s Missy Shelton contributed reporting for this story.</em><p>A commencement address from President Barack Obama capped a difficult year for the Joplin High School class of 2012.<p><a href="http://news.stlpublicradio.org/term/joplin-tornado">An EF-5 tornado</a> struck the southwestern Missouri town a year ago today, killing 161 people and injuring hundreds more. The storm destroyed five school buildings, including the high school. Tue, 22 May 2012 12:57:01 +0000 editor 14558 at http://kbia.org In Joplin, President Obama urges students to "pay it forward"